.home {
    width: 500px;
    height: 400px;
    margin: 50px auto;
    border: 1px #ccc solid;
    display: flex;
}

.nav {
    width: 80px;
    border-right: 1px #ccc solid;
}

.btn {
    height: 30px;
    border-bottom: 1px #ccc solid;
    background: #ccc;
    text-align: center;
    line-height: 30px;
    /*color: white;*/
}
.btn a{
    display: block;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

a {
    text-decoration: none;
    color: inherit;
    CurSOr: auto;
}
.active{
    background: red;
    color: white;
}
.content{
    padding: 10px;
}